Warn about variables which are initialized to themselves
Wimplicit
-C ObjC C++ ObjC++ Warning
+C ObjC Var(warn_implicit) Init(-1) Warning
+Warn about implicit declarations
Wimplicit-function-declaration
C ObjC Var(warn_implicit_function_declaration) Init(-1) Warning
Warn about implicit function declarations
Wimplicit-int
-C ObjC Var(warn_implicit_int) Warning
+C ObjC Var(warn_implicit_int) Init(-1) Warning
Warn when a declaration does not specify a type
Wimport
C ObjC C++ ObjC++ Undocumented
Wint-to-pointer-cast
-C ObjC Var(warn_int_to_pointer_cast) Init(1) Warning
+C ObjC C++ ObjC++ Var(warn_int_to_pointer_cast) Init(1) Warning
Warn when there is a cast to a pointer from an integer of a different size
Winvalid-offsetof
fnonnull-objects
C++ ObjC++
+fnothrow-opt
+C++ ObjC++ Optimization Var(flag_nothrow_opt)
+Treat a throw() exception specification as noexcept to improve code size
+
; Generate special '- .cxx_construct' and '- .cxx_destruct' methods
; to initialize any non-POD ivars in Objective-C++ classes.
fobjc-call-cxx-cdtors
C++ ObjC++
Display statistics accumulated during compilation
+fstrict-enums
+C++ ObjC++ Optimization Var(flag_strict_enums)
+Assume that values of enumeration type are always within the minimum range of that type
+
fstrict-prototype
C++ ObjC++
extensions enabled by this mode are experimental and may be removed in
future releases of GCC.
+std=c1x
+C ObjC
+Conform to the ISO 201X C standard draft (experimental and incomplete support)
+
std=c89
C ObjC
Conform to the ISO 1990 C standard
standard, dubbed C++0x. Note that the extensions enabled by this mode
are experimental and may be removed in future releases of GCC.
+std=gnu1x
+C ObjC
+Conform to the ISO 201X C standard draft with GNU extensions (experimental and incomplete support)
+
std=gnu89
C ObjC
Conform to the ISO 1990 C standard with GNU extensions